China and Russia know that they have nothing to fear from the Norks because they know that the Norks know that one false move by them means absolute,immediate destruction.Given that the Norks are useful to both countries as a threat to us,the US.Anything suggesting that either country wants the Norks to stop is a charade.
Eventually, Red China will discover they have a much brighter economic and international political future without NK. Then they will know what they have to do.